Calculate execution timing instead of just getting the time
Calculate execution timing instead of just getting the time

This is relevant if NTP updated the system time between start and end of
a measurement

personalunion/glimpse_client-1,Kri-7-q/glimpse_client-1,HSAnet/glimpse_client,personalunion/glimpse_client-1,MKV21/glimpse_client,HSAnet/glimpse_client,HSAnet/glimpse_client,Kri-7-q/glimpse_client-1,MKV21/glimpse_client,HSAnet/glimpse_client,personalunion/glimpse_client-1,Kri-7-q/glimpse_client-1,Kri-7-q/glimpse_client-1,personalunion/glimpse_client-1,Kri-7-q/glimpse_client-1,MKV21/glimpse_client,HSAnet/glimpse_client,MKV21/glimpse_client,personalunion/glimpse_client-1,MKV21/glimpse_client